My Duster 360 motor with 9 to 1 compression runs & idles great with a 280H comp cam. Rebuilt 587 heads, Performer RPM manifold, Edelbrock 750 cfm #1407 carb & Hooker header. Rebuilt 904 transmission with a Hughes 2600 stall convertor. Rearend is an 8-3/4 with 3.91 gears and a Powertrax Locker. I...